EP4115851A1 - Höhenverstellbarer wirbelsäulenfusionskäfig - Google Patents

Höhenverstellbarer wirbelsäulenfusionskäfig Download PDF

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Publication number
EP4115851A1
EP4115851A1 EP20923562.1A EP20923562A EP4115851A1 EP 4115851 A1 EP4115851 A1 EP 4115851A1 EP 20923562 A EP20923562 A EP 20923562A EP 4115851 A1 EP4115851 A1 EP 4115851A1
Authority
EP
European Patent Office
Prior art keywords
end plate
spinal fusion
fusion cage
movable block
adjustment member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20923562.1A
Other languages
English (en)
French (fr)
Other versions
EP4115851A4 (de
Inventor
Gook Jin Kang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
L&K Biomed Co Ltd
Original Assignee
L&K Biomed Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by L&K Biomed Co Ltd filed Critical L&K Biomed Co Ltd
Publication of EP4115851A1 publication Critical patent/EP4115851A1/de
Publication of EP4115851A4 publication Critical patent/EP4115851A4/de
Pending legal-status Critical Current

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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2/30721—Accessories
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    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
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    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • A61F2002/30616—Sets comprising a plurality of prosthetic parts of different sizes or orientations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30795—Blind bores, e.g. of circular cross-section
    • A61F2002/30797—Blind bores, e.g. of circular cross-section internally-threaded
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30904—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves serrated profile, i.e. saw-toothed

Definitions

  • the present invention relates to a height-adjustable spinal fusion cage. More specifically, the present invention relates to a height-adjustable spinal fusion cage which is inserted between vertebral bodies in a state where the cage has the lowest height, is height-adjustable in the inserted state, and particularly can simplify a height adjustment mechanism.
  • the vertebral body includes 32 to 35 vertebrae and intervertebral disks, which are simply called disks, between the vertebrae, and is the central part of the body that connects the skull at the top and the pelvis at the bottom.
  • the vertebra is composed of 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 5 sacral vertebrae (sacrum), and 3 to 5 coccygeal vertebrae (coccyx). In adults, the five sacral vertebrae fuse into one sacrum, and the three to five coccygeal vertebrae fuse into one coccyx.
  • Spinal fusion is a method of treating serious spinal diseases that last for a long time.
  • an intervertebral disk is removed, and a cage is inserted as a substitute between adjacent vertebral bodies to join the adjacent vertebral bodies together.
  • the spinal fusion methods for the lumbar spine may be classified, depending on the insertion direction of a cage, into posterior lumbar interbody fusion (PLIF), Transformational lumbar interbody fusion (TLIF), lateral lumbar interbody fusion (LLIF), oblique lumbar interbody fusion (OLIF), anterior lumbar interbody fusion (ALIF), etc.
  • PLIF posterior lumbar interbody fusion
  • TLIF Transformational lumbar interbody fusion
  • LLIF lateral lumbar interbody fusion
  • OLIF oblique lumbar interbody fusion
  • ALIF anterior lumbar interbody fusion
  • Posterior lumbar interbody fusion is a method of making an incision along the midline of the lumbar spine to entirely expose a vertebra, removing a posterior portion of the vertebra, removing a disk, and inserting PLIF cages.
  • Posterior lumbar interbody fusion is the oldest method among lumbar interbody fusion methods, and is necessary when fusing two or three vertebrae together.
  • posterior lumbar interbody fusion has disadvantages such as a high possibility of adhesions at the nerves, ligaments, and muscles due to surgical procedures, a long recovery time due to a large incision area, and serious sequelae in some patients.
  • PLIF cages a pair of small cages configured to be arranged at the left and right sides, are smallest among all the cages used for spinal fusion.
  • Transforaminal lumbar interbody fusion is a surgical method in which small incisions are made along both sides of a spine muscle to minimally expose the body of a vertebra, and then while removing a portion of the vertebra to expose a neural foramen, a TLIF cage is inserted instead of a disk.
  • This surgical technique is advantageous in terms of less bleeding and a short operation time and is suitable for one joint, but PLIF is required when treating multiple sites.
  • Most TLIF cages are arc shaped, and thus the convex portion of a TLIF cage is oriented toward the abdomen by inserting and rotating the TLIF cage between vertebral bodies.
  • TLIF cages are larger than PLIF cages, but the supporting areas of TLIF cages are smaller than those is of LLIF cages or ALIF cages, which will be mentioned later.
  • ALIF anterior lumbar interbody fusion
  • US9585762 and US2019-0133782A disclose height-adjustable, self-supporting ALIF cages.
  • a vertical ratchet 302 is used for height adjustment, and angle adjustment is substantially performed instead of height adjustment.
  • US2019-0133782A discloses height adjustment but has problems such as a very complicated structure and difficulty in manufacturing.
  • the cage for the cervical vertebrae is inserted only by ACIF. Since the ACIF cage has a considerably low height, it is not easy to implement height adjustment compared to the ALIF, and US10034767 , which can also be used as an ACIF cage, has been disclosed. However, in US 10034767 , the surroundings are closed by the wall which is disadvantageous for supplying bone grafts.
  • a torque limit handle is connected to the screwdriver used when extending the vertebral bodies, so that it can be used only within a predetermined torque range.
  • the torque limit handle has a complex structure and is heavy.
  • An object of the present invention derived for solving the above-mentioned problems is to provide a spinal fusion cage which is inserted between vertebral bodies in a state where the cage has the lowest height, is height-adjustable in the inserted state, can stably support the movement of a pair of end plates, and particularly can simplify a height adjustment mechanism.
  • the present invention provides spinal fusion cage, comprising: a first end plate and a second end plate which are in contact with adjacent vertebral bodies; a distal movable block fixed to be movable relative to plate slope portions formed on one end of the first end plate and one end of the second end plate; a proximal movable block fixed to be movable relative to plate slope portions formed on another end of the first end plate and another end of the second end plate; an adjustment member rotatably fixed to the proximal movable block and screwed to the distal movable block to adjust a distance between the distal movable block and the proximal movable block; a first guide portion formed on the first end plate toward the second end plate; and a second guide portion formed on the second end plate toward the first end plate to limit, by sliding with the first guide portion, a movement direction in which the first end plate and the second end plate are moved close to or away from each other, wherein the first guide portion and the second guide portion support
  • the cage further comprises a bone screw inserted into bone screw holes formed on the first end plate and the second end plate.
  • a block slider is formed on the distal movable block and the proximal movable block, and a plate slider slidable with respect to the block slider is formed on the plate slope portion.
  • the adjustment member comprises a threaded portion formed on an end thereof and screwed to the distal movable block, and an adjustment member support surface formed on another end thereof and rotatable at a given position with respect to the proximal movable block.
  • the proximal movement block comprises an inner fastening portion spaced apart from an outer surface of the adjustment member in the proximal direction compared to the adjustment member support surface.
  • An outer fastening portion is formed on an outer surface of the proximal movable block.
  • the proximal movable block comprises an inner fastening portion spaced apart from an outer surface of the adjustment member in the proximal direction compared to the adjustment member support surface, and an outer fastening portion formed on an outer surface of the proximal movable block.
  • a first tool fastening portion binding to a tool is formed on an outer surface of the removable portion.
  • a second tool fastening portion is formed on an outer surface of an adjustment member head which is formed at one side of the adjustment member in the proximal direction so as to bind to the tool.
  • the first tool fastening portion and the second tool fastening portion have the same cross sections.
  • the inside of the removable portion is penetrated.
  • connection portion is arranged along a proximal edge of the adjustment member head, and the connection portion consists of at least two connection units.
  • connection unit comprises a notch in an inner circumferential side or an outer circumferential side of the adjustment member head.
  • the first guide portion comprises a pillar protruding toward the second end plate
  • the second guide portion comprises an extension wall protruding toward the first end plate so as to be slidable with respect to the pillar.
  • An accommodation portion is formed around the pillar to receive the extension wall when the first end plate and the second end plate approach.
  • a guide recess is formed on the extension wall to guide the insertion of the pillar.
  • An anchor portion having no screw thread is formed on a distal end portion of the bone screw.
  • the anchor portion includes an anchor groove extending in the length direction of the bone screw.
  • cages having heights within a given range can be replaced with one cage. Therefore, manufacturers may reduce the number of product groups and the amount of inventory. Additionally, since the height of the cage is linearly adjustable according to the distance between the vertebral bodies of patients unlike conventional cages having heights preset at predetermined intervals, surgery may be performed at an optimal height according to the conditions of patients.
  • the burden of separately producing test inserts according to the existing proper intervertebral spacing may be reduced, and the effort of securing an insertion space while inserting a plurality of test inserts sequentially may be reduced from the doctor's point of view.
  • the height adjustment mechanism can be simplified through the adjustment member which gives way when a predetermined torque is applied.
  • a distal end direction means a direction into which the cage is inserted
  • a proximal direction means a direction opposite to the distal end direction
  • Figs. 1 to 8 entirely illustrate a spinal fusion cage 100 according to embodiments, and Figs. 9 to 21 illustrate each element of the spinal fusion cage 100.
  • the spinal fusion cage 100 generally includes a first end plate 102 and a second end plate 104 which face each other in a vertical direction, a distal movable block 108 and a proximal movable block 106 which are arranged between the first end plate 102 and the second end plate 104 to move along the distance between the first end plate 102 and the second end plate 104, and an adjustment member 110 which is connected to the distal movable block 108 through the proximal movable block 106.
  • the first end plate 102 and the second end plate 104 include a first plate body 104 and a second plate body 146 which have tooth-shaped protrusions on surfaces to be brought into contact with vertebral bodies.
  • the tooth-shaped protrusions are formed to prevent separation from vertebral bodies and may be variously modified.
  • a first window 144 and a second window 172 may be respectively formed in a center portion of the first plate body 104 and a center portion of the second plate body 146 such that a bone graft may be inserted therethrough.
  • a proximal movable block seat 130 is formed along the length direction of the first plate body 122 in the proximal direction, and a distal movable block seat 138 is formed in the distal direction.
  • a plate slope portion 128 is formed by extending from the proximal movable block seat 130, and a pair of plate sliders 132 facing each other are formed on both sides of the plate slope portion 128.
  • a bone screw hole 134 is formed on an outer side of the plate slider 132. The bone screw hole 134 is penetrated so that the bone screw 120 may be inserted, and a guide surface 136 for guiding the bone screw 120 may be formed on an entrance side of the bone screw hole 134.
  • a plate slope portion 140 is formed around the distal movable block seat 138.
  • the plate slope portion 140 is formed on both ends of the distal movable block seat 138, and plates sliders 142 are respectively formed on outer sides of the plate slope portion 140.
  • the plate slider 132 formed on the proximal portion and the plate slider 142 formed on the distal end portion are formed to be sloped in a manner approaching the center of the first plate body 122 as they go away from a surface of the first plate body 122 in the thickness direction.
  • a proximal movable block seat 156 is formed along the length direction of the second plate body 146 in the proximal direction, and a distal movable block seat 164 is formed in the distal direction.
  • a plate slope portion 154 is formed by extending from the proximal movable block seat 156, and a pair of plate sliders 158 facing each other are formed on both sides of the plate slope portion 154.
  • a bone screw hole 160 is formed on an outer side of the plate slider 158. The bone screw hole 160 is penetrated so that the bone screw 120 may be inserted, and a guide surface 162 for guiding the bone screw 120 may be formed on an entrance side of the bone screw hole 160.
  • a plate slope portion 166 is formed around the distal movable block seat 164.
  • the plate slope portion 166 is formed on both ends of the distal movable block seat 164, and plates sliders 168 are respectively formed on outer sides of the plate slope portion 166.
  • the plate slider 158 formed on the proximal portion and the plate slider 168 formed on the distal end portion are formed to be sloped in a manner of approaching the center of the second plate body 146 as they go away from a surface of the second plate body 146 in the thickness direction.
  • a block slope portion 190 is formed on the proximal side around a proximal connection tube body 190 having an adjustment member hole 188 into which the adjustment member 110 is inserted and supported.
  • Block sliders 180 which are slidably coupled to the plate sliders 132, 158 formed on the first and second end plates 102, 104 are arranged on both sides of the block slope portion 190.
  • the adjustment member hole 184 includes a support portion 184 which is to be in contact with the adjustment member 110 for supporting the adjustment member, and a support jaw 186 formed around the support portion 184 for preventing separation of the adjustment member 110.
  • a pinhole 178 capable of installing a pin member 118 is formed on a lateral portion of the proximal movable block 106 in order to prevent the adjustment member 110 located in the support portion 184 from being separated to the proximal side.
  • an outer fastening portion 176 is formed on a lateral portion of the proximal movable block 106 so that the tool can fix the spinal fusion cage 100.
  • the outer fastening portion 176 may be formed with protrusions or screw threads, etc., and may be used to be coupled with tools or other implants such as plates.
  • an inner fastening portion 182 may be formed on the inner side of the outer fastening portion 176 around the adjustment member 110.
  • the inner fastening portion 182 may have screw threads, and may be used to be coupled with tools or other implants such as plates.
  • a distal connection tube body 198 having a movable block thread portion 202 which is screwed with the adjustment member 110 is formed on a center portion of the distal movable block 108, and a wing portion 196 is provided on both sides of the distal connection tube body 198.
  • a block slope portion 194 is formed on the wing portion 196, and a block slider 204 is arranged on both sides of the wing portion 196.
  • the block slider 204 is slidably coupled to the plate sliders 142, 168 of the first and second end plates 102, 104, respectively.
  • the distal movable block 108 has a distal wall 192 for ease of insertion between the vertebral bodies in the distal direction, and the distal wall 192 is formed in one piece with the block slope portion 194. Additionally, in a lowest state, the distal wall 192 is in contact with an end portion of the first end plate 102 and an end portion of the second end plate 104 to form one insertion portion as a whole. In particular, a distal bent surface 208 is formed on both sides of the distal wall 192 to facilitate the insertion.
  • the distal movable block 108 and the proximal movable block 106 have a substantially wedge-shaped structure, and are configured to push or support the first end plate 102 and the second end plate 104 to lift or lower the same.
  • the adjustment member 110 may have a substantially bolt shape.
  • Figs. 20 and 21 illustrate adjustment members 310, 410 according to modified embodiments.
  • the above three adjustment members 110, 310, 410 will be explained at one go, and only the characteristics of each will be described.
  • the adjustment members 110, 310, 410 include adjustment member heads 220, 320, 420, adjustment thread portions 214, 314, 414 which are integrally connected to the adjustment member heads 220, 320, 420 to the distal side and screwed to the movable block thread portion 202 of the distal movable block 108, and removable portions 218, 318, 418 which are connected to the adjustment member heads 220, 320, 420 in the proximal direction through connection portions 222, 322, 422.
  • An adjustment member support surface 212 may be formed between the adjustment member heads 220, 320, 420 and the adjustment thread portions 214, 314, 414.
  • Pin support portions 228, 328, 428 are formed to the proximal side of the adjustment member support surfaces 212, 312, 412, and pin seats 216, 316, 416 in which the end portion of the pin member 118 is located are formed to the proximal side of the pin support portions 228, 328, 428. Therefore, the adjustment members 110, 310, 410 rotate while the adjustment member support surfaces 212, 312, 412 contact the support portion 188, in a state where the pin support portions 228, 328, 428 are supported by the support jaw 186 of the proximal movable block 106. As a result, the adjustment member 120 can rotate at a given position inside the adjustment member 110.
  • the adjustment member heads 220, 320, 420 are formed on the proximal side of the adjustment members 110, 310, 410, and removable portions 218, 318, 418 are connected to the proximal side of the adjustment member heads 220, 320, 420 by the connection portions 222, 322, 422.
  • a first tool fastening portion binding to a tool may be formed on an outer surface of the removable portions 218, 318, 418. Additionally, as illustrated in Figs. 17 and 18 , the first tool fastening portion may be formed in a hexagonal shape, or in a star shape or a rectangular shape as illustrated in Figs. 20 and 21 , but is not limited thereto, and various modifications can be made.
  • a second tool fastening portion may be formed on an outer surface of the adjustment member heads 220, 320, 420 so as to bind to a tool.
  • the second tool fastening portion may be formed in a hexagonal shape as illustrated in Figs. 17 and 18 , or in a star shape or a rectangular shape as illustrated in Figs. 20 and 21 , but is not limited thereto, and various modifications can be made.
  • the cross sections of the first tool fastening portion and the second tool fastening portion may be formed to be the same.
  • the screwdriver may be pushed to the end, thereby contacting the removable portions 218, 318, 418 and the adjustment member heads 220, 320, 420 at the same time.
  • the removable portions 218, 318, 418 can deliver a torque without being cut, and thus can be utilized when a doctor determines to be necessary.
  • the screwdriver selectively rotates in a state inserted only in the removable portions 218, 318, 418, it is possible to separate the removable portions 218, 318, 418 from the adjustment member heads 220, 320, 420. Furthermore, even when the spinal fusion cage 100 is seated on the patient's body with a screwdriver and then replaced with another product later, it is possible to rotate the adjustment member heads 220, 320, 420 with the same screwdriver. Thus, it is very cost-effective in preparing the tool.
  • grooves such as a straight groove or a cross groove may be processed at the end side of the proximal portion of the removable portions 218, 318, 418 to replace or supplement the first tool fastening portion.
  • the inside of the removable portions 218, 318, 418 is penetrated, and thus may communicate with opening grooves 226, 326, 426 formed on the adjustment member heads 220, 320, 420.
  • the opening grooves 226, 326, 426 may have a screwdriver tip shape.
  • through holes 224, 324, 424 may adjust the position of the adjustment members 110, 310, 410 using the opening grooves 226, 326, 426 when the removable portions 218, 318, 418 are still formed in one piece.
  • connection portions 222, 322, 422 are arranged along the proximal edge of the adjustment member heads 220, 320, 420, and the connection portions 222, 322, 422 may consist of at least two connection units.
  • the adjustment member heads 220, 320, 420 and the removable portions 218, 318, 418 may be spaced apart from each other with a gap by the connection unit.
  • the connection unit may have a notch in the inner circumferential side or outer circumferential side of the adjustment member heads 220, 320, 420. Therefore, it is possible for the designer to set a required limit torque value based on the number of the connection units, the circumferential length and radial thickness of the connection unit, and the size of the notch.
  • the limit torque value of the connection portions 222, 322, 422 may perform the function of a torque limit handle used in the prior art, the torque limit handle may be omitted in the screwdriver required for rotating the adjustment members 110, 310, 410. Thus, the tools may be made simpler and lighter. In particular, when the torque limit handle is used for a long time, the set value changes and thus periodic correction or replacement is required. However, in the spinal fusion cage 100 according to the present invention, when a product is produced according to a quality procedure through a certain process in a factory, since the limit torque value of the connection portions 222, 322, 422 becomes constant within the allowable limits of error, the product may have a certain limit torque value even when the time elapses.
  • a screwdriver such as an Allen wrench may be used.
  • the shape of the removable portion 318 in Fig. 20 is a star, a star-shaped screwdriver may be used.
  • other modifications can be made, such as a removable portion 418 having a rectangular cross-section in Fig. 21 .
  • a pair of pillars 124 are formed on both sides of the first plate body 122 in the thickness direction, that is, in the direction toward the second end plate 104. Additionally, an accommodation portion 126 for receiving an extension wall 148 which will be mentioned later is formed around the pillar 124. Also, the extension wall 148 is formed on both sides of the second plate body 146 in the thickness direction, that is, in the direction toward the first end plate 102, and a groove 150 for guiding the pillar 124 to be received is formed on an inner side of the extension wall 148. Therefore, as the pillar 124 is received inside the groove 150 and moves vertically, the first end plate 102 and the second end plate 104 moves toward or away from each other in a restricted state.
  • the pillar 124 and the extension wall 148 correspond to a first guide portion and a second guide portion.
  • the first guide portion and the second guide portion have a function of supporting a load or torsion in the length or width direction of the first end plate 102 and the second end plate 104.
  • the extension wall 148 When viewed from the top, the extension wall 148 has a substantially U-shape to surround the pillar 124. More specifically, the extension wall 148 includes a first wall 1481 located in the proximal direction, a second wall 1482 located in the distal direction, and a third wall 1483 which connects the first wall 1481 and the second wall 1482. When viewed having the groove 150 as the center, the first wall 1481 and the second wall 1482 are located at a bottom surface (opposite surface of the surface facing the vertebral bodies) of the first and second end plates 102, 104 so as to maintain the width of the groove 150 as it is. Additionally, the third wall 1483 is formed to maintain the depth of the groove 150 in the direction opposite to the direction where the groove 150 is open.
  • the thickness in the length direction as well as the width direction of the pillar 124 can be increased. Therefore, the first wall 1481 and the second wall 1482 support the shear force in the length direction, and the third wall 1483 supports the shear force in the width direction. Accordingly, the strength of the shear force in the length and width drection may be dramatically increased.
  • the bone screw 120 used in the embodiments will be explained with reference to Fig. 20 .
  • the bone screw 120 illustrated in Fig. 20 includes a screw head 236 which limits the entry amount of the bone screw 120 when it is inserted into the bone screw holes 134, 160, a tool seat 238 which is formed on the screw head 236 to be fastened to a tool, and a threaded portion 240 which is integrally formed with the screw head 236 and is inserted into the vertebral bodies.
  • the threaded portion 240 may selectively use a double-lead thread and a single-lead thread so as to be suitable for the cancellous bones or cortical bones.
  • an anchor portion 242 is formed on the end portion of the threaded portion 240 inserted into the vertebral bodies.
  • an additional tool such as an awl is required to set an initial direction.
  • the screw thread may often be meaningless in this area. Therefore, by forming a certain area on the distal end of the threaded portion 248 as the anchor portion 242, the bone screw 242 does not require a separate tool for setting an initial direction, and because insertion is carried out by hitting for a certain area, discomfort caused by rotating the screw may be reduced.
  • the anchor portion 242 has a nail-like shape in which only an end portion of a shank has a conical tip for the ease of insertion. Additionally, in the anchor portion 242, an anchor groove may be formed in the length direction of the bone screw 252. In this case, the contact area with the bone becomes larger, thereby increasing the anchoring force.
  • the spinal fusion cage 100 is configured as described above, and a surgery method using the spinal fusion cage 100 will now be described.
  • a surgical path to vertebral bodies is secured using surgical tools, and a disk is removed. Additionally, in a state where the spinal fusion cage 100 is held by a cage holder not illustrated, the spinal fusion cage 100 is inserted between the vertebral bodies from which the disk has been removed.
  • the proximal movable block 106 and the distal movable block 108 are moved close to each other by fastening the tools such as a screwdriver, etc. to the removable portions 218, 318, 418 of the adjustment member 110, and rotating the screwdriver in one direction, and thus the first end plate 102 and the second end plate 104 are moved apart from each other.
  • the torque of the screwdriver is greater than a predetermined torque determined by the connection portions 222, 322, 422, the connection portions 222, 322, 422 are destroyed, and thereby the removable portions 218, 318, 418 are separated from the adjustment member heads 220, 320, 420. Accordingly, it is possible to prevent the delivery of excessive load on the vertebral fusion cage 100 to the vertebral bodies.
  • the bone screw 120 is inserted into and fixed to the bone screw holes 134, 160 of the first end plate 102 and the second end plate 104.
  • a hole is initially formed using a tool called an awl, and the hole is deepened with a drill through the pre-formed hole.
  • a screw thread is formed to be slightly smaller than the bone screw 120 with a tool called a tapper to form a path for the screw thread to proceed, and then the bone screw 120 is inserted by rotating with a tool such as a screwdriver, etc.
  • the formation of the screw thread by the tapper may be omitted.
  • an anchor portion 242 is formed on the end portion of the bone screw 120, tools such as an awl, a drill, a tapper, etc. are omitted when inserting the bone screw 120, and the direction setting and initial insertion of the bone screw 120 are performed by hitting with a tool such as a mallet, etc., and then the remaining threaded portion is inserted by rotating with a tool such as screwdriver, etc. Accordingly, the insertion process of the spinal fusion cage 100 is completed.
  • the bone screw 120 is rotated with a tool such as a screwdriver, etc. to be separated from the spinal fusion cage 100.
  • the bone screw 120 having an anchor portion is pulled out with a pincer to be separated after being separated from the screw thread area.
  • the proximal movable block 106 and the distal movable block 108 are moved away from each other by inserting a tool such as a screwdriver, etc. into the adjustment member 110 and reversely rotating the tool. Then, the first end plate 102 and the second end plate 104 are moved close to each other, and thus the entire height of the spinal fusion cage 100 is reduced, and the spinal fusion cage 100 is removed from the vertebral bodies.
  • one cage may be used for a given height range, thereby reducing the burden of inventory and production. Additionally, repetitive tasks during surgery are reduced, thereby reducing burdens on surgeons. In addition, the operation time and the amount of bleeding may be reduced, and thus the recovery time of patients may be greatly reduced. Therefore, the present disclosure may be widely used in related fields.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Neurology (AREA)
  • Vascular Medicine (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Cardiology (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP20923562.1A 2020-03-06 2020-11-06 Höhenverstellbarer wirbelsäulenfusionskäfig Pending EP4115851A4 (de)

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KR1020200028480A KR102117224B1 (ko) 2020-03-06 2020-03-06 높이조절이 가능한 척추 유합 케이지
PCT/KR2020/015457 WO2021177543A1 (ko) 2020-03-06 2020-11-06 높이조절이 가능한 척추 유합 케이지

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Families Citing this family (2)

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KR102117224B1 (ko) * 2020-03-06 2020-06-01 (주)엘앤케이바이오메드 높이조절이 가능한 척추 유합 케이지
KR102489197B1 (ko) * 2020-05-25 2023-01-17 (주)엘앤케이바이오메드 높이조절이 가능한 척추 유합 케이지

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6648917B2 (en) * 2001-10-17 2003-11-18 Medicinelodge, Inc. Adjustable bone fusion implant and method
WO2004098453A2 (en) * 2003-05-06 2004-11-18 Triage Medical, Inc. Proximal anchors for bone fixation system
AU2006230512A1 (en) * 2005-03-31 2006-10-05 Life Spine, Inc Expandable spinal interbody and intravertebral body devices
US8105382B2 (en) * 2006-12-07 2012-01-31 Interventional Spine, Inc. Intervertebral implant
US10383741B2 (en) * 2013-03-13 2019-08-20 Life Spine, Inc. Expandable spinal interbody assembly
US9149367B2 (en) 2013-03-15 2015-10-06 Globus Medical Inc Expandable intervertebral implant
US10034767B2 (en) 2014-06-03 2018-07-31 Atlas Spine, Inc. Spinal implant device
AU2014100879A4 (en) * 2014-08-05 2014-09-11 D'Urso, Paul Steven MR It is the intension of this invention to provide an expandable interbody fusion cage which will expand in all three planes to allow the incorporation of a larger amount of bone graft in the expanded state and facilitate a higher surface area of contact of such bone graft and the fusion cage itself with the vertebral bodies.
US9585762B2 (en) 2014-10-09 2017-03-07 K2M, Inc. Expandable spinal interbody spacer and method of use
US10034771B2 (en) * 2016-05-11 2018-07-31 Warsaw Orthopedic, Inc. Spinal implant system and method
US10682239B2 (en) * 2017-01-06 2020-06-16 Ke Ling Biotech Limited Expandable spinal interbody cage
US10709569B2 (en) 2017-11-09 2020-07-14 Globus Medical, Inc. Expandable intervertebral implant
KR102117224B1 (ko) * 2020-03-06 2020-06-01 (주)엘앤케이바이오메드 높이조절이 가능한 척추 유합 케이지

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WO2021177543A1 (ko) 2021-09-10
EP4115851A4 (de) 2024-04-10
US20230114356A1 (en) 2023-04-13
KR102117224B1 (ko) 2020-06-01
JP2023517199A (ja) 2023-04-24

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